Beyma 4FR40 Full-range Woofer

The Beyma 4FR40 Full-range Woofer is a meticulously engineered broadband driver that delivers clear, coherent sound across the entire frequency spectrum, making it an ideal choice for compact speaker designs where space is at a premium. This versatile unit excels in a variety of applications, from high-fidelity home audio systems and studio monitors to custom car audio installations and portable PA enclosures. Its full-range capability eliminates the need for a separate tweeter in many designs, simplifying crossover networks and ensuring seamless sound reproduction.

Technically, the 4FR40 boasts an 87 dB SPL sensitivity (1m/2.83V) and a total Q factor (Qts) of 0.88, offering a balanced blend of efficiency and controlled bass response. The 101.6 mm nominal diameter driver features a 3 mm maximum linear excursion (Xmax) and a displacement volume (Vd) of 11, providing solid low-end output for its size. With a DC resistance (Re) of 6.4 ohms and a voice coil inductance (Le) of just 0.2 mH, it maintains excellent transient response. The electromagnetic Q (Qes) is 0.96, while mechanical losses (Rms) are 0.23, contributing to its smooth performance. Installation is straightforward thanks to a 92 mm cut-out diameter, a 108.2 mm bolt circle, and four mounting holes, all within a shallow 60 mm depth. Whether for a bespoke bookshelf speaker or a refined automotive upgrade, the Beyma 4FR40 delivers reliable, full-range audio with impressive clarity.